Slide rule



April 29, 1969 s. GoLDsTl-:IN

SLIDE RULE Filed Sept. 20, 1967 FIG.

2 3 4'@ fav-189|] 2 3 MIS 67591 INVENTOR.

SOL GOLDSTEI N JOHN P. CHANDLE HIS ATTORNEY.

United States Patent O U.S. Cl. 23S-70 2 Claims ABSTRACT OF THEDISCLOSURE A simple slide rule made from paper for incorporation intothe binding of a magazine or the like by means of a tab extending fromthe body of the rule which supports the slide and where the slide isfreed for sliding movement when the body is severed from the tab.

This invention relates to a simple slide rule formed from a single bankof paper or other sheet material which can receive markings. The sliderule of the present invention can be incorporated into the binding of amagazine, book or the like. A pocket is formed by a central section ofthe blank, and two tiaps are adhered together to form the 4body or fixedpart of the slide rule, and a section extending from one end of thecentral section, is folded into the pocket before the flaps are glued.The slide rule of the present invention is so inexpensive that it can bemade and bound into a magazine at a cost about equal to the cost of apage therein.

This section is of a length greater than the length of the main sectionof the blank and is folded rearwardly over the cent-ral section so thatits free end coincides with the adjoining end of the central section,thus leaving at the opposite end a tab of double thickness extendingbeyond the end of the body. This tab is incorporated into the binding ofthe magazine or book and when the body is torn from the tab alongweakened lines the extension is free for movement on the slidingcomponent of the slide rule.

In the drawing:

FIG. 1 is a plan view of the blank used in forming the slide rule;

FIG. 2 is a plan view of the complete rule ready for incorporation in tothe binding;I

'FIG. 3 is a plan view of the completed rule;

FIG. 4 is a section taken on line `4---4 of FIG. 3.

The slide rule of the present invention may be formed from a singleblank of paper or other flexible mark receiving material having aplurality of fold lines dividing the blank into a plurality lofsections, including a central rectangular section 10 having an elongatedslot 11 therein. Flaps l12 and 14 are carried along opposed longitudinaledges along fold lines 16 and 18 and these iiaps are folded back overthe central section and adhered together 'in overlapping relation, thusforming a pocket 20. At one lateral edge 21, these ilaps and the centralsections have curved cut-out sections 22 with the material removed, fora purpose to be described.

At the opposite end 24, the central section 10 has a longitudinalextension 25 of a length greater than the ice distance between edges 21and 24 and a width slightly less than the width of said central section.The reason why this extension member is of lesser width than the centralsection is to permit it to slide freely through the pocket. When theextension is folded back over the cen tral section before application ofthe adhesive along a fold line 2-6 to cause its outer lateral edge 28 tocoincide generally with edge 21 at the opposite end of the blank, thereis formed a tab 29 of double thickness lying outside the pocket.

A'magazine or book is indicated in broken lines at 31 and this tab isincorporated into the binding indicated at 32. The two layers ofmaterial forming the tab have weakened line 33 lying just outside ofedge 24. Until such time as the body of the folded blank is severed fromthe tab along weakened lines 33, the extension section 25 is immovablewithin the pocket. When, however, the severance has been completed theextension is freed and formsx the sliding element of the slide rule.Cut-out sections 22 permit tbe slide to be grasped and when the slide ismoved to the right, a substantial section of the slide at the left handend is exposed and can be grouped.

The material which can be imprinted on the front faces of the centralsection and the slide can have a variety of forms. A mathematical sliderule, like that shown, may be employed or it can :be used for timingvarious dishes for cooking.

The embodiments of the invention in which the exclusive property orprivilege is claimed are delined as follows:

1. A slide rule made from a single blank of tiexible sheet material forinsertion into the binding of a book, periodical or the like, said blankhaving a central rec tangular section with an elongated slot therein,and flaps carried along the longitudinal edges and folded rearwardlyover the central section to form a pocket, a section extendinglongitudinally from one end of the central section and having threespaced weakened lines near the inner end of said extension section, saidextension section being of greater length and lesser width than Ithecentral section and being folded rearwardly along one of said weakenedlines over the central section and into said pocket with its outer endcoinciding with the opposite end of the central portion, thus leaving afolded tab of double thickness outside the pocket, which can be insertedinto said binding, whereby the slide rule can be severed from the tabalong two of said weakened lines, thus freeing the extension formovement as the slide of the rule.

2. The structure recited in claim 1 wherein at least one end of theblank has linger receiving cut-outs.

RICHARD B. WILKINSON, Primary Examiner. S. A. WAL, Assistant Examiner.

U.S. Cl. XR.

